Hydraulic Radius of a Pipe

Hydraulic radius, abbreviated as \(r_h\), is the area cross-section of water in a pipe or channel divided by the wetting perimeter.

 

Article Links

• Hydraulic Radius of a Partially Full Pipe (Less than Half Full)
• Hydraulic Radius of a Partially Full Pipe (More than Half Full)

 

 

 

Hydraulic radius of a Pipe formula
\(\large{ r_h =  \frac  {  A_c }  { P_w }   }\)
Symbol	English	Metric
\(\large{ r_h }\) = hydraulic radius	\(\large{ in }\)	\(\large{ mm }\)
\(\large{ A_c }\) = area cross-section of flow	\(\large{ in^2 }\)	\(\large{ mm^2 }\)
\(\large{ P_w }\) = wetting perimeter	\(\large{ in }\)	\(\large{ mm }\)